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ferritic stainless steel with excellent formability at room temperature and with good mechanical eigenchaften in which temperatures, and method of producing the same
ferritic stainless steel with excellent formability at room temperature and with good mechanical eigenchaften in which temperatures, and method of producing the same
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机译:在室温下具有良好成形性且在该温度下具有良好的机械强度的铁素体不锈钢及其生产方法
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摘要
A ferritic stainless steel sheet which has not only superior high-temperature fatigue characteristics, but also superior workability at room temperatures. The steel sheet contains, by weight percent, C: not more than 0.02 %, Si: 0.2 to 1.0 %, Mn: not more than 1.5 %, Cr: 11.0 to 20.0 %, Ni: 0.05 to 2.0 %, Mo: 1.0 to 2.0 %, Al: not more than 1.0 %, Nb: 0.2 to 0.8 %, and N: not more than 0.02 %, balance essentially Fe, and an aspect ratio (dRD/dTD) of grain size in planes at 1/4 and 3/4 sheet thickness, seen a direction normal to a sheet surface, in the range of 1.03 to 1.35. The steel sheet has a thickness greater than 0.3 mm but not greater than 2.5 mm, and a yield strength Y.S. ≤ 360 MPa and an r-value ≥ 1.3 at 30 DEG C, and wherein after maintaining the steel sheet at 900 DEG C for one hour, the Y.S. ≥ 18.0 MPa.
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